The complex containing ferroceneyl, Cd(dppf)I2(dppf=1,1 bis(diphenylphosphino) ferrocene), was synthesized and characterized by IR, Uv vis DRIS spectrum and X ray diffraction. The crystal belongs to monoclinic, space ...The complex containing ferroceneyl, Cd(dppf)I2(dppf=1,1 bis(diphenylphosphino) ferrocene), was synthesized and characterized by IR, Uv vis DRIS spectrum and X ray diffraction. The crystal belongs to monoclinic, space group C2/c, a=37.439(3)?, b=10.2472(6)?, c=18.719(1)?, β=110.4715(16)°, V=6727.8(8)?3, Z=8, Dc=1.818g·cm-3, F(000)=3536, μ=3.015mm-1, R=0.0308, wR=0.0692. dppf coordinates to Cd? as bidentate ligand, and the coordination environment of Cd? is a distorted tetrahedron. The electronic structures of Cd(dppf)I2 and Cd(dppf)Br2 are discussed by quantum chemistry calculation.展开更多
By the reaction of bidentate ligand 1,1'-bis(diphenylphosphino)-ferrocene (dppf) with MoCl_4(CH_3CN)_2, a novel bonding type complex (MoCl_4)2_· (dppf) was synthesized and characterized by elemental analyses,...By the reaction of bidentate ligand 1,1'-bis(diphenylphosphino)-ferrocene (dppf) with MoCl_4(CH_3CN)_2, a novel bonding type complex (MoCl_4)2_· (dppf) was synthesized and characterized by elemental analyses, ^(31)p-NMR, IR and electronic spectra, TG and ICP-AES. Structure of the title complex was proposed.展开更多
针对传统动态概率潮流(dynamic probability power flow,DPPF)计算结果存在的保守性问题,提出一种计及风速预测误差时空相关性的DPPF计算方法。首先,采用自相关系数平稳过程描述输入变量的预测误差过程,利用非参数核密度估计直接根据预...针对传统动态概率潮流(dynamic probability power flow,DPPF)计算结果存在的保守性问题,提出一种计及风速预测误差时空相关性的DPPF计算方法。首先,采用自相关系数平稳过程描述输入变量的预测误差过程,利用非参数核密度估计直接根据预测误差历史数据拟合得到预测误差分布;其次,基于等概率变换理论和Nataf变换技术得到具有时空相关性的误差样本。最后,通过基于拉丁超立方采样的蒙特卡罗模拟法进行DPPF计算,得到节点电压幅值和支路潮流的数字特征和动态概率分布。采用IEEE 14节点和IEEE 118节点系统进行仿真,验证了算法准确性和效率。展开更多
A facile method for the carbonylative cycliza- tion of o-bromobenzoic acid with primary amine using Pd（OAC）2 as a metal precursor and 1, l′-bis（diphenylpho- sphino）ferrocene （dppf） as a ligand has been develope...A facile method for the carbonylative cycliza- tion of o-bromobenzoic acid with primary amine using Pd（OAC）2 as a metal precursor and 1, l′-bis（diphenylpho- sphino）ferrocene （dppf） as a ligand has been developed. The effect of various reaction parameters such as ligand, solvent, base, time and temperature on this cyclization was studied. The optimized protocol was used for a wide variety of substituted aryl amines with different steric and electronic properties, affording the corresponding isoindoline-l,3-diones in good to excellent yields under atmospheric pressure of carbon monoxide at 100℃ within 10h using 1,4-diazabicyclo[2.2.2]octane （DABCO） as a base. The reaction system finds attractive alternative to the conventional multistep synthetic process and thus repre- sents an effective utilization of carbonylative protocol for synthesis of valuable chemicals.展开更多
文摘The complex containing ferroceneyl, Cd(dppf)I2(dppf=1,1 bis(diphenylphosphino) ferrocene), was synthesized and characterized by IR, Uv vis DRIS spectrum and X ray diffraction. The crystal belongs to monoclinic, space group C2/c, a=37.439(3)?, b=10.2472(6)?, c=18.719(1)?, β=110.4715(16)°, V=6727.8(8)?3, Z=8, Dc=1.818g·cm-3, F(000)=3536, μ=3.015mm-1, R=0.0308, wR=0.0692. dppf coordinates to Cd? as bidentate ligand, and the coordination environment of Cd? is a distorted tetrahedron. The electronic structures of Cd(dppf)I2 and Cd(dppf)Br2 are discussed by quantum chemistry calculation.
文摘By the reaction of bidentate ligand 1,1'-bis(diphenylphosphino)-ferrocene (dppf) with MoCl_4(CH_3CN)_2, a novel bonding type complex (MoCl_4)2_· (dppf) was synthesized and characterized by elemental analyses, ^(31)p-NMR, IR and electronic spectra, TG and ICP-AES. Structure of the title complex was proposed.
基金supported by the National Natural Science Foundation of China(21672105,21725204,91753124)Natural Science Foundation of Tianjin,China(17JCYBJC19700,18JCZDJC32800)~~
文摘针对传统动态概率潮流(dynamic probability power flow,DPPF)计算结果存在的保守性问题,提出一种计及风速预测误差时空相关性的DPPF计算方法。首先,采用自相关系数平稳过程描述输入变量的预测误差过程,利用非参数核密度估计直接根据预测误差历史数据拟合得到预测误差分布;其次,基于等概率变换理论和Nataf变换技术得到具有时空相关性的误差样本。最后,通过基于拉丁超立方采样的蒙特卡罗模拟法进行DPPF计算,得到节点电压幅值和支路潮流的数字特征和动态概率分布。采用IEEE 14节点和IEEE 118节点系统进行仿真,验证了算法准确性和效率。
文摘A facile method for the carbonylative cycliza- tion of o-bromobenzoic acid with primary amine using Pd（OAC）2 as a metal precursor and 1, l′-bis（diphenylpho- sphino）ferrocene （dppf） as a ligand has been developed. The effect of various reaction parameters such as ligand, solvent, base, time and temperature on this cyclization was studied. The optimized protocol was used for a wide variety of substituted aryl amines with different steric and electronic properties, affording the corresponding isoindoline-l,3-diones in good to excellent yields under atmospheric pressure of carbon monoxide at 100℃ within 10h using 1,4-diazabicyclo[2.2.2]octane （DABCO） as a base. The reaction system finds attractive alternative to the conventional multistep synthetic process and thus repre- sents an effective utilization of carbonylative protocol for synthesis of valuable chemicals.
